Speech-evoked brainstem response in normal adolescent and children speakers of Brazilian Portuguese

Abstract

This study aimed to analyze the coding responses of speech sounds (syllable/da/) in children and adolescent speakers of Brazilian Portuguese with typical development and normal hearing, aged between 8 and 16 years, in order to establish normative data of speech ABR response. This normative data can be used as a reference for speech ABR responses and also to enable the diagnosis in individuals with different pathologies. The analyze for absolute latency of speech sounds, more specifically the syllable/da/, for speech-ABR in children and adolescent speakers of Brazilian Portuguese with typical development were: right ear - wave V (6,43–6,57), wave A (7,35–7,57), wave C (18,19–18,46), wave D (21,99–22,42), wave E (30,73–31,05), wave F (39,19–39,55) and wave O (47,75–48,24) and left ear - wave V (6,44–6,57), wave A (7,36–7,59), wave C (18,26–18,55), wave D (22,22 -22,50), wave E (30,58–30,97), wave F (39,05–39,35) and wave O (47,78–48,13). For the amplitude values (μv), the responses were within the following ranges: right ear - wave V (0,10–0,14), wave A (0,19–0,25), wave C (0,08–0,13), wave D (0,11–0,17), wave E (0,17–0,42), wave F (0,14–0,33) and wave O (0,11–0,31) and left ear - wave V (0,09–0,13), wave A (0,08–0,23), wave C (0,08–0,14), wave D (0,10–0,15), wave E (0,20–0,26), wave F (0,16–0,22) and wave O (0,12–0,20). For the values of complex VA (slope: μv/ms and area μv x ms) the follow values obtained were: right ear – slope (0,32–0,42) and area (0,29–0,38) and left ear – slope (0,30–0,39) and area (0,27–0,35).